29998405 has 4 divisors (see below), whose sum is σ = 35998092. Its totient is φ = 23998720.

The previous prime is 29998403. The next prime is 29998411. The reversal of 29998405 is 50489992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12173121 + 17825284 = 3489^2 + 4222^2 .

It is not a de Polignac number, because 29998405 - 2¹ = 29998403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29998403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2999836 + ... + 2999845.

It is an arithmetic number, because the mean of its divisors is an integer number (8999523).

Almost surely, 2^29998405 is an apocalyptic number.

It is an amenable number.

29998405 is a deficient number, since it is larger than the sum of its proper divisors (5999687).

29998405 is an equidigital number, since it uses as much as digits as its factorization.

29998405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5999686.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 29998405 is about 5477.0799702031. The cubic root of 29998405 is about 310.7177437913.

It can be divided in two parts, 29998 and 405, that added together give a palindrome (30403).

The spelling of 29998405 in words is "twenty-nine million, nine hundred ninety-eight thousand, four hundred five".